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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The substance showed no acute toxicity to microorganisms in sewage sludge.

Key value for chemical safety assessment

EC10, LC10 or NOEC for microorganisms:
305 mg/L

Additional information

The aquatic toxicity of the test item FAT 40849/A TE to microbial activity in sewage sludge was tested in a valid GLP activated sludge respiratory inhibition test in accordance with EU Method C.11. Activated sludge from a treatment plant processing predominantly domestic sewage was exposed to the substance for 3 hours under aerated conditions to a series of test concentrations ranging from nominal 10 to 1000 mg/L. The substance had no inhibitory effect (inhibition of <10%) on the sludge activity up to and with the test concentration of 320 mg/L and the activity was only slightly inhibited (<18%) at the highest test concentration. The EC50 value for inhibition hence was >1000 mg/L and the NOEC was 305 mg/L.